It would be great if someone could tell me where to find the Institute Building?

I did not find it in the C.I.T Ruins wich where pointed out in every single photo on google, so i have no clue where to find it on my own

Would be great with a photo of where exactly the Institute is.

You don't find it, it finds you. It's under the ruins have to do the msq to access it.

Nobody knows where the Institute is... until the Sole Survivor progresses through the Main Quest. Then everything makes sense, including why you couldn't find them yourself.

And how to get there By that i mean, wich quests do i have to do to get there, cause i have a trillion quests right now xD

Well, you could - perhaps - maybe - look up the detective in Diamond City? And see what happens?

The Main Quests. If you haven't progressed through them at all, then check the "Jewel of the Commonwealth" or "Unlucky Valentine" quest.

*Dramatic music*

Haven't you been paying attention? You don't find The Institute, The Institute finds you.

I'm sure he waited for an eternity to use the "Soviet Russia" meme in a serious situation. It's like the biggest middle finger he could give to a grieving parent XD

EDIT: forums think that he is not funny, judging by the censor filter